CN102136332A - Permanent magnet ferrite material for injection molding and manufacture method thereof - Google Patents
Permanent magnet ferrite material for injection molding and manufacture method thereof Download PDFInfo
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- CN102136332A CN102136332A CN 201010602376 CN201010602376A CN102136332A CN 102136332 A CN102136332 A CN 102136332A CN 201010602376 CN201010602376 CN 201010602376 CN 201010602376 A CN201010602376 A CN 201010602376A CN 102136332 A CN102136332 A CN 102136332A
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Abstract
The invention discloses a permanent magnet ferrite material for injection molding and a manufacture method thereof, belonging to the field of permanent magnet ferrite materials. The granule is compounded by the following components in percentage by mass: 80-92% of permanent magnet ferrite, 3-6% of rubber, 2.5-10% of plasticizer and 0.1-3% of accessory ingredient, wherein the permanent magnet ferrite adopts iron strontium oxide Sr0.6Fe2O3; and the rubber comprises main rubber and assistant rubber, wherein the main rubber accounts for 55-95% of the total mass of the rubber. The iron strontium oxide Sr0.6Fe2O3 serves as the permanent magnet ferrite, and the permanent magnet ferrite, the rubber, the plasticizer and the accessory ingredient are compounded into a flexible permanent magnet ferrite material. The material can be manufactured into flexible injection granules and can be subjected to injection molding to manufacture a position sensor; the manufactured position sensor is a flexible sensor with good flexibility; and compared with the traditional rigid position sensor with poor flexibility, which is made of nylon injection particles, the position sensor is durable and convenient and has low cost.
Description
Technical field
The present invention relates to the permanent-magnet ferrite material field, especially relate to a kind of injection moulding with flexible permanent-magnet ferrite material material and manufacture method thereof.
Background technology
In pneumatic components and parts, the device that uses in a kind of oil cylinder as position transducer is arranged.Position transducer adopts the bonded ferrite magnetic material.Because the operational environment of the frequent back and forth movement of cylinder and adaptation all temps requires magnetic sensor to have oil resistance and good pliability.
Magnetic material injection moulding is after a kind of particle that plastics or rubber and magnetic are obtained after mixing plastifies in the injection molding machine heating cylinder, is expelled to the processing method that forms goods in the die cavity of close die by plunger or reciprocating screw.This method can be processed complex contour, size is accurate or the goods of band inserts, the production efficiency height.But the material that is used for injection moulding must have good fluidity, just can be full of die cavity and obtain goods.
Bonded permanent ferrite is divided into rubber bound permanent-magnet ferrite and nylon adhesive permanent magnetism ferrite, rubber bound magnet is flexible, and the nylon bonded magnet is a rigidity.The pellet of bonded permanent ferrite injection at present normally adopts nylon and magnetic mixing to prepare by extruding forming method.Adopt the injection pellet of nylon composition preparation to have good flowability, be fit to the high performance bonded permanent ferrite magnet of preparation, fully used at present.But owing under the normal temperature be that the injection moulding magnet of main component generally is a rigidity with nylon, almost do not have flexibility and become a kind of fragile material, in cylinder, make the device of position transducer owing to require frequent back and forth movement in cylinder, fragile materials easily broken and cause need be often emat sensor more, therefore, its pliability is difficult to satisfy the instructions for use of position transducer in the oil cylinder in the pneumatic components and parts, be not suitable for the use of position transducer magnetic device in the cylinder, therefore require a kind of suitable injection moulding of development, can access the injection pellet of flexible magnet.
Summary of the invention
Based on above-mentioned existing in prior technology problem, embodiment of the present invention provides a kind of injection moulding with flexible permanent-magnet ferrite material and manufacture method thereof, have good oil resistance, thermal stability, pliability and flowability, can make things convenient for injection moulding, the pliability of the position transducer of making can satisfy in-oil cylinder instructions for use in the pneumatic components and parts.
The objective of the invention is to be achieved through the following technical solutions:
Embodiment of the present invention provides a kind of injection moulding flexible permanent-magnet ferrite material, and this pellet is composited by permanent-magnet ferrite 80～92%, rubber 3～6%, plasticizer 2.5～10% and auxiliary agent 0.1～3% by mass percentage; Wherein permanent-magnet ferrite adopts strontium ferrite Sr
0.6Fe
2O
3Rubber comprises primary elastomeric and auxiliary rubber, and primary elastomeric content accounts for 55～95% of rubber gross mass.
Primary elastomeric in the described rubber adopts haloflex (CPE) and/or polyvinyl chloride (PVC); Auxiliary rubber adopts chlorosulfonated polyethylene (CSM), vinylacrylic acid ester rubber (AEM), acrylate rubber (ACM), any one among polyurethane elastomer (TPU), acrylonitrile-butadiene rubber (BR), the plasticity polyester elastomer TPEE or several arbitrarily.
The chlorine quality percentage composition of the haloflex that described primary elastomeric adopts is 30～50%; The average degree of polymerization of the polyvinyl chloride that primary elastomeric adopts is 800～2500.
Described plasticizer adopt in dioctyl phthalate (DOP), trioctyl trimellitate (TOTM) (TOTM), dibutyl phthalate (DBP), diisooctyl phthalate (DIDP), adipic acid dibutyl ester (DOA), decanedioic acid dibutyl ester (DOS), phthalic acid two (2 one propyl group heptan) ester (DPHP), epoxidized soybean oil, polyester plasticizer, the PETO (PETO) any one or several arbitrarily.
Described auxiliary agent comprises: lubricant, heat stabilizer and antioxidant.
Described lubricant adopts ethylene bis stearic acid amide (EBS), pentaerythritol stearate (PETS), monoglyceride, stearic acid, zinc stearate, calcium stearate, any one in Tissuemat E, chlorinated paraffin wax, the paraffin oil or several arbitrarily.
Described heat stabilizer adopt organic tin stabilizer, calcium zinc be in stabilizer, the liquid rare earth stabilizer any one or several arbitrarily.
In described antioxidant employing amine antioxidants, hindered phenol anti-oxidants, phosphorous acid esters antioxidant, thio-based antioxidants, the complex class antioxidant any one or several arbitrarily.
Embodiment of the present invention also provides the manufacture method of a kind of injection moulding with flexible permanent-magnet ferrite material, comprising:
Get each raw material by the prescription of above-mentioned flexible permanent-magnet ferrite pellet;
Primary elastomeric in the rubber is carried out kneading and plasticizing: with primary elastomeric and plasticizer in masticator under 100～130 ℃ of temperature kneading to primary elastomeric fully plastify;
Magnetic and binding agent mixing: the primary elastomeric that the auxiliary rubber in magnetic, the rubber, auxiliary agent and plasticizing is good in mill or banbury mixing evenly, promptly obtain flexible permanent-magnet ferrite material.
Described method also comprises:
Calendering is handled: the material after will be mixing even is on 120～170 ℃ the calender, to be pressed into the suitable material of thickness in temperature;
Pelletizing is handled: the material that the thickness that will obtain after will rolling is suitable is undertaken obtaining flexible permanent-magnet ferrite pellet after the pelletizing by pelleter.
The technical scheme that provides by the embodiment of the invention as can be seen, in the embodiment of the invention by with strontium ferrite Sr
0.6Fe
2O
3Form a kind of permanent-magnet ferrite composite material of flexibility as permanent-magnet ferrite and rubber, plasticizer and auxiliary agent.This material is by choosing auxiliary rubber material with intensity preferably and the good percentage elongation mechanical performance modifier as polyvinyl chloride and haloflex blend, the contradiction of balance hot strength and percentage elongation preferably reaches the optimization of hot strength and percentage elongation; By with polyvinyl chloride or haloflex as the primary elastomeric material, add that the device of the synergy preparation of auxiliary rubber material has pliability preferably; Polyvinyl chloride and haloflex itself have good weather, collaborative use by suitable auxiliary rubber and plasticizer, auxiliary agent such as stabilizer and antioxidant, can prepare and have good flowability or oil resistance, perhaps thermal endurance, perhaps flexible injection pellet material performance, that satisfy various different demands such as cold resistance.This material can injection moulding be made position transducer, the position transducer of making is the good flexible sensor of pliability, be different from the bad rigid location transducer of pliability that traditional nylon injection pellet is made, it is more durable, convenient to make that this position transducer uses, and cost is low.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
Embodiment 1
Present embodiment provides a kind of flexible permanent-magnet ferrite material, can make the injection pellet of flexible magnet, has good oil resistance, thermal stability, pliability and flowability.This flexibility permanent-magnet ferrite material can be made into the injection pellet, and then is used for injection moulding and makes position transducer.
This flexibility permanent-magnet ferrite material is to be composited by by mass percentage permanent-magnet ferrite 80～92%, rubber 3～6%, plasticizer 2.5～10% and other auxiliary addition agent 0.1～3%; Wherein permanent-magnet ferrite adopts strontium ferrite Sr
0.6Fe
2O
3Rubber comprises primary elastomeric and auxiliary rubber, and primary elastomeric content accounts for 55～95% of rubber gross mass.
The rubber that adopts in the above-mentioned flexible permanent-magnet ferrite material requires to have oil resistance, and primary elastomeric adopts haloflex (CPE) and/or polyvinyl chloride (PVC); When primary elastomeric adopts haloflex, the chlorinity in the haloflex of adopting 30～50%; When primary elastomeric adopted polyvinyl chloride, the average degree of polymerization of the polyvinyl chloride of employing was between 800～2500; Auxiliary rubber can adopt among chlorosulfonated polyethylene (CSM), vinylacrylic acid ester rubber (AEM), acrylate rubber (ACM), polyurethane elastomer (TPU), acrylonitrile-butadiene rubber (BR), the plasticity polyester elastomer TPEE any one or arbitrarily several and use.
In the plasticizer employing dioctyl phthalate (DOP) that adopts in the above-mentioned flexible permanent-magnet ferrite material, trioctyl trimellitate (TOTM) (TOTM), dibutyl phthalate (DBP), diisooctyl phthalate (DIDP), adipic acid dibutyl ester (DOA), decanedioic acid dibutyl ester (DOS), phthalic acid two (2-propyl group heptan) ester (DPHP), epoxidized soybean oil, polyester plasticizer, the PETO (PETO) any one or several arbitrarily.Specifically can require according to the weatherability of flexible permanent-magnet ferrite material to select, make material can reach cold-resistant, high temperature resistant or resistance to oxidation etc.Plasticizer has mainly improved weatherability, flowability, tensile strength and the percentage elongation of injection pellet.
The auxiliary addition agent that adopts in the above-mentioned flexible permanent-magnet ferrite material comprises: lubricant, heat stabilizer and antioxidant, according to the instructions for use of rubber, the consumption of general auxiliary addition agent accounts for the gross mass percentage of flexible permanent-magnet ferrite material less than 3%.
In lubricant employing ethylene bis stearic acid amide (EBS) in the above-mentioned auxiliary addition agent, pentaerythritol stearate (PETS), monoglyceride, stearic acid, zinc stearate, calcium stearate, Tissuemat E, chlorinated paraffin wax, the paraffin oil any one or several arbitrarily.The lubricant that is adopted is to improve the inside and outside lubrification of flexible permanent-magnet ferrite material.
It is any one or several combination arbitrarily of stabilizer, liquid rare earth stabilizer that heat stabilizer in the above-mentioned auxiliary addition agent adopts organic tin stabilizer, calcium zinc, can bring into play the synergy of multiple heat stabilizer when being used in combination.Should consider the synergy between heat stabilizer and the plasticizer when selecting heat stabilizer for use, make the whole heat-resisting effect of flexible permanent-magnet ferrite material with raising.
In employing amine antioxidants in the above-mentioned auxiliary addition agent, hindered phenol anti-oxidants, phosphorous acid esters antioxidant, thio-based antioxidants, the complex class antioxidant any one or several arbitrarily.
The manufacture method of above-mentioned flexible permanent-magnet ferrite material, concrete following step comprises:
Get each raw material by the prescription of above-mentioned flexible permanent-magnet ferrite material;
Primary elastomeric in the rubber is carried out kneading and plasticizing: with primary elastomeric and plasticizer in masticator under 100～130 ℃ of temperature kneading to primary elastomeric fully plastify; Wherein, plasticizer can adopt multiple mode to add, and when plasticizer when being multiple, can mix the disposable adding in back, also can not mix respectively to add successively, and also can be to be divided into many parts after mixing, more respectively by part adding.
Magnetic and binding agent mixing: the primary elastomeric that the auxiliary rubber in magnetic, the rubber, auxiliary agent and plasticizing is good in mill or banbury mixing evenly, promptly obtain flexible permanent-magnet ferrite material.
For further obtaining flexible permanent-magnet ferrite pellet, the flexible permanent-magnet ferrite material that obtains can be rolled with pelletizing and handle, be specially:
Calendering is handled: the material after will be mixing even is on 120～170 ℃ the calender, to be pressed into the suitable material of thickness in temperature;
Pelletizing is handled: the material that the thickness that will obtain after will rolling is suitable is undertaken obtaining flexible permanent-magnet ferrite pellet after the pelletizing by pelleter.
Embodiment 2
Present embodiment provides a kind of flexible permanent-magnet ferrite material, can make the injection pellet of flexible magnet, has good oil resistance, thermal stability, pliability and flowability.This flexibility permanent-magnet ferrite material can be made into the injection pellet, and then is used for injection moulding and makes position transducer.
The manufacture method of this flexibility permanent-magnet ferrite material is as follows, comprising:
In mass fraction, at first be 1300 polyvinyl chloride powder with 80 parts average degree of polymerization, 5 parts of calcium zinc is that dioctyl phthalate (DOP), 20 parts of trioctyl trimellitate (TOTM)s (TOTM), 5 parts of adipic acid dibutyl esters (DOA), 25 parts of epoxidized soybean oils of stabilizer and 100 parts join together and carry out plasticizing in 20 minutes in the Z type kneader under 120 ℃ temperature;
To plastify good polyvinyl chloride powder then and after fully mixing on 140 ℃ mill or the banbury, promptly obtain flexible permanent-magnet ferrite material together with 18 parts of PNBRs, 30 parts haloflex, 4 parts monoglyceride and antioxidant and permanent magnetic ferrite magnetic powder.
Further, the mixing flexible permanent-magnet ferrite material that obtains after evenly can be rolled into sheet under the required thickness, obtain injecting pellet with the pelleter pelletizing then.This changes the injection pellet and has very high flowability, and cold resistance and oil resistance can be used for injection moulding and make position transducer.
Embodiment 3
Present embodiment provides a kind of flexible permanent-magnet ferrite material, can make the injection pellet of flexible magnet, has good oil resistance, thermal stability, pliability and flowability.This flexibility permanent-magnet ferrite material can be made into the injection pellet, and then is used for injection moulding and makes position transducer.
The manufacture method of this flexibility permanent-magnet ferrite material is as follows, comprising:
In mass fraction, it at first is 1800 polyvinyl chloride powder with 68 parts average degree of polymerization, 5 parts of calcium zinc is that the o-phthalic acid dibutyl ester (DOP) of stabilizer and 70 parts joins together in the Z type kneader and plastifies under 120 ℃ temperature, adds 25 parts of trioctyl trimellitate (TOTM)s (TOTM), 5 parts of polyester plasticizers, 25 parts of epoxidized soybean oils then successively and fully plastifies up to polyvinyl chloride;
To plastify good polyvinyl chloride powder then with 30 parts of acrylonitrile-butadiene rubbers, 42 parts haloflex, 2 parts monoglyceride and age resister, 3 parts ethylene bis stearic acid amide (EBS) or pentaerythritol stearate (PETS) and the permanent magnetic ferrite magnetic powder abundant mixing flexible permanent-magnet ferrite material that promptly obtains on 150 ℃ banbury together.
Further, the mixing flexible permanent-magnet ferrite material that obtains after evenly can be rolled into sheet under the required thickness, obtain injecting pellet with the pelleter pelletizing then.This injection pellet has very high flowability, pliability, thermal stability and oil resistance, can be used for injection moulding and makes position transducer.
Embodiment 4
Present embodiment provides a kind of flexible permanent-magnet ferrite material, can make the injection pellet of flexible magnet, has good oil resistance, thermal stability, pliability and flowability.This flexibility permanent-magnet ferrite material can be made into the injection pellet, and then is used for injection moulding and makes position transducer.
The manufacture method of this flexibility permanent-magnet ferrite material is as follows, comprising:
In mass fraction, it at first is 1000 polyvinyl chloride powder with 65 parts viscosity number, 5 parts of calcium zinc is that the dibutyl phthalate (DBP) of stabilizer and 80 parts joins together in the Z type kneader and plastifies under 130 ℃ temperature, adds 20 parts of trioctyl trimellitate (TOTM)s (TOTM), 5 parts of polyester plasticizers, 20 parts of epoxidized soybean oils then successively and fully plastifies up to polyvinyl chloride;
To plastify good polyvinyl chloride powder then and after fully mixing on 160 ℃ the banbury, promptly obtain flexible permanent-magnet ferrite material together with 30 parts of vinylacrylic acid ester rubber (AEM), 35 parts haloflex, 4 parts pentaerythritol stearate (PETS) and permanent magnetic ferrite magnetic powder.
Further, the mixing flexible permanent-magnet ferrite material that obtains after evenly can be rolled into sheet under the required thickness, obtain injecting pellet with the pelleter pelletizing then.Change the injection pellet and have very high pliability, thermal stability and oil resistance, can be used for injection moulding and make position transducer.
Embodiment 5
Present embodiment provides a kind of flexible permanent-magnet ferrite material, can make the injection pellet of flexible magnet, has good oil resistance, thermal stability, pliability and flowability.This flexibility permanent-magnet ferrite material can be made into the injection pellet, and then is used for injection moulding and makes position transducer.
The manufacture method of this flexibility permanent-magnet ferrite material is as follows, comprising:
In mass fraction, it at first is 1800 polyvinyl chloride powder with 72 parts average degree of polymerization, 6 parts of calcium zinc is that the dioctyl phthalate (DOP) of stabilizer and 20 parts joins together in the Z type kneader and plastifies under 130 ℃ temperature, adds 50 parts of diisooctyl phthalates (DIDP), 30 parts of polyester plasticizers, 15 parts of epoxidized soybean oils then successively and fully plastifies up to polyvinyl chloride;
To plastify good polyvinyl chloride powder then and promptly obtain flexible permanent-magnet ferrite material abundant on 160 ℃ the banbury after mixing together with 35 parts of polyurethane elastomers, 40 parts haloflex, 4 parts pentaerythritol stearate (PETS) and 4 parts of chlorinated paraffin waxs and permanent magnetic ferrite magnetic powder.
Further, the mixing flexible permanent-magnet ferrite material that obtains after evenly can be rolled into sheet under the required thickness, obtain injecting pellet with the pelleter pelletizing then.Change the injection pellet and have very high pliability, thermal stability, pliability and oil resistance, can be used for injection moulding and make position transducer.
The raw material of above-mentioned flexible permanent-magnet ferrite material all can adopt the powdery type material.
In the rubber of embodiment of the invention raw material, primary elastomeric adopts polyvinyl chloride (PVC) and/or haloflex (CPE), polyvinyl chloride (PVC) is a kind of amorphous linear polymer, has performances such as good tensile, injection flow, black brittleness, anti-solvent.When both used as primary elastomeric simultaneously, the mechanical performance modifier that haloflex (CPE) can be used as polyvinyl chloride (PVC) used.Haloflex has the complex phase block structure: the block of chlorination and the not block of chlorination.The chlorinty of polyvinyl chloride is 56.8%, if the chlorinty of CPE is too low, the compatibility of it and PVC is poor, form two phase structure after the blend, and CPE is a decentralized photo, then it and matrix PVC adhesion very little.The chlorinty height of the CPE then compatibility with matrix PVC is good, may form the structure of homogeneous phase after the blend.Both of these case all is disadvantageous to improving mechanical performance.Only choose the CPE of moderate chlorinty, it had both had goodish elasticity, with polyvinyl chloride certain compatibility is arranged again, with polychloroethylene blended after can form two phase structure, decentralized photo CPE and matrix PVC, interface combination is preferably arranged again, and CPE just can bring into play its toughening effect fully like this, causes the mechanical performance of blend obviously to improve.
However, the ferromagnetic oxide powder mass percent up to nearly 90% filling effect situation under, the hot strength of blend and growth rate still can obviously descend.Can address this problem by adding plasticizer.Plasticizer reaches the relative motion ability that will increase the PVC macromolecular interchain behind the finite concentration in system, reduced the crystallinity of PVC macromolecular chain, improved the plasticity of macromolecular material, thereby obviously increase the percentage elongation of the permanent-magnet ferrite composite material that makes, but also can cause the decline of hot strength simultaneously.Regulate composite material machinery performance so adopt the plasticizer of specific consumption among the present invention.In embodiments of the present invention, by choosing auxiliary rubber material with intensity preferably and good percentage elongation mechanical performance modifier as polyvinyl chloride and haloflex blend, the contradiction of balance hot strength and percentage elongation preferably reaches the optimization of hot strength and percentage elongation.By with polyvinyl chloride or haloflex as the primary elastomeric material, add that the device of the synergy preparation of auxiliary rubber material has pliability preferably.Polyvinyl chloride and haloflex itself have good weather, collaborative use by suitable auxiliary rubber and plasticizer, auxiliary agent such as stabilizer and antioxidant, can prepare and have good flowability or oil resistance, perhaps thermal endurance, perhaps flexible permanent-magnet ferrite material performance, that satisfy various different demands such as cold resistance.
In sum, pass through with strontium ferrite Sr in the embodiment of the invention
0.6Fe
2O
3Be compounded to form a kind of permanent-magnet ferrite material of flexibility as permanent-magnet ferrite and rubber, plasticizer and auxiliary agent.After this material can be made the flexible injection pellet, make position transducer by injection moulding, the position transducer of making is the good flexible sensor of pliability, be different from the bad rigidity position transducer of pliability that traditional nylon injection pellet is made, it is more durable, convenient to make that this position transducer uses, and cost is low.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (10)
1. the flexible permanent-magnet ferrite material of injection moulding is characterized in that, this pellet is composited by permanent-magnet ferrite 80～92%, rubber 3～6%, plasticizer 2.5～10% and auxiliary agent 0.1～3% by mass percentage; Wherein permanent-magnet ferrite adopts strontium ferrite Sr
0.6Fe
2O
3Rubber comprises primary elastomeric and auxiliary rubber, and primary elastomeric content accounts for 55～95% of rubber gross mass.
2. the flexible permanent-magnet ferrite material of injection moulding according to claim 1 is characterized in that, the primary elastomeric in the described rubber adopts haloflex and/or polyvinyl chloride; Auxiliary rubber adopts chlorosulfonated polyethylene, vinylacrylic acid ester rubber, acrylate rubber, any one in polyurethane elastomer, acrylonitrile-butadiene rubber, the plasticity polyester elastomer or several arbitrarily.
3. the flexible permanent-magnet ferrite material of injection moulding according to claim 2 is characterized in that, the chlorine quality percentage composition of the haloflex that described primary elastomeric adopts is 30～50%; The average degree of polymerization of the polyvinyl chloride that primary elastomeric adopts is 800～2500.
4. the flexible permanent-magnet ferrite material of injection moulding according to claim 1, it is characterized in that, described plasticizer adopt in dioctyl phthalate, trioctyl trimellitate (TOTM), dibutyl phthalate, diisooctyl phthalate, hexanedioic acid dibutyl ester, decanedioic acid dibutyl ester, phthalic acid two (2 one propyl group heptan) ester, epoxidized soybean oil, polyester plasticizer, the PETO any one or several arbitrarily.
5. the flexible permanent-magnet ferrite material of injection moulding according to claim 1 is characterized in that described auxiliary agent comprises: lubricant, heat stabilizer and antioxidant.
6. the flexible permanent-magnet ferrite material of injection moulding according to claim 5, it is characterized in that, described lubricant adopts ethylene bis stearic acid amide, pentaerythritol stearate, monoglyceride, stearic acid, zinc stearate, calcium stearate, any one in Tissuemat E, chlorinated paraffin wax, the paraffin oil or several arbitrarily.
7. the flexible permanent-magnet ferrite material of injection moulding according to claim 5 is characterized in that, described heat stabilizer adopt organic tin stabilizer, calcium zinc be in stabilizer, the liquid rare earth stabilizer any one or several arbitrarily.
8. the flexible permanent-magnet ferrite material of injection moulding according to claim 5, it is characterized in that any one in described antioxidant employing amine antioxidants, hindered phenol anti-oxidants, phosphorous acid esters antioxidant, thio-based antioxidants, the complex class antioxidant or several arbitrarily.
9. an injection moulding is characterized in that with the manufacture method of flexible permanent-magnet ferrite material, comprising:
Prescription by aforesaid right requirement 1～8 each described flexible permanent-magnet ferrite material is got each raw material;
Primary elastomeric in the rubber is carried out kneading and plasticizing: with primary elastomeric and plasticizer in masticator under 100～130 ℃ of temperature kneading to primary elastomeric fully plastify;
Magnetic and binding agent mixing: the primary elastomeric that the auxiliary rubber in magnetic, the rubber, auxiliary agent and plasticizing is good in mill or banbury mixing evenly, promptly obtain flexible permanent-magnet ferrite material.
10. injection moulding according to claim 9 is characterized in that with the manufacture method of flexible permanent-magnet ferrite material described method also comprises:
Calendering is handled: the material after will be mixing even is on 120～170 ℃ the calender, to be pressed into the suitable material of thickness in temperature;
Pelletizing is handled: the material that the thickness that will obtain after will rolling is suitable is undertaken obtaining flexible permanent-magnet ferrite pellet after the pelletizing by pelleter.
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| CN102976767B (en) * | 2012-12-17 | 2014-08-06 | 南通万宝实业有限公司 | Method for selecting dry-pressed strontium permanent ferrite binding agent without loss of coercive force |
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Address after: 100070 Beijing Fengtai District South Fourth Ring West Road 188 18 District 23 Building 4 Floor Patentee after: North Polytron Technologies Inc Address before: 100070 Beijing Fengtai District South Fourth Ring West Road 188 6 District 5 Building Patentee before: Beikuan Magnetic-material Science & Technology Co., Ltd. |
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Effective date of registration: 20190725 Address after: 236000 Yingzhou Economic Development Zone, Fuyang City, Anhui Province Patentee after: Beikuang magnetic materials (Fuyang) Co., Ltd. Address before: 100070 Beijing Fengtai District South Fourth Ring West Road 188 18 District 23 Building 4 Floor Patentee before: North Polytron Technologies Inc |